67 lines · c
1// SPDX-License-Identifier: GPL-2.02/*3 * linux/fs/ext4/xattr_security.c4 * Handler for storing security labels as extended attributes.5 */6 7#include <linux/string.h>8#include <linux/fs.h>9#include <linux/security.h>10#include <linux/slab.h>11#include "ext4_jbd2.h"12#include "ext4.h"13#include "xattr.h"14 15static int16ext4_xattr_security_get(const struct xattr_handler *handler,17 struct dentry *unused, struct inode *inode,18 const char *name, void *buffer, size_t size)19{20 return ext4_xattr_get(inode, EXT4_XATTR_INDEX_SECURITY,21 name, buffer, size);22}23 24static int25ext4_xattr_security_set(const struct xattr_handler *handler,26 struct mnt_idmap *idmap,27 struct dentry *unused, struct inode *inode,28 const char *name, const void *value,29 size_t size, int flags)30{31 return ext4_xattr_set(inode, EXT4_XATTR_INDEX_SECURITY,32 name, value, size, flags);33}34 35static int36ext4_initxattrs(struct inode *inode, const struct xattr *xattr_array,37 void *fs_info)38{39 const struct xattr *xattr;40 handle_t *handle = fs_info;41 int err = 0;42 43 for (xattr = xattr_array; xattr->name != NULL; xattr++) {44 err = ext4_xattr_set_handle(handle, inode,45 EXT4_XATTR_INDEX_SECURITY,46 xattr->name, xattr->value,47 xattr->value_len, XATTR_CREATE);48 if (err < 0)49 break;50 }51 return err;52}53 54int55ext4_init_security(handle_t *handle, struct inode *inode, struct inode *dir,56 const struct qstr *qstr)57{58 return security_inode_init_security(inode, dir, qstr,59 &ext4_initxattrs, handle);60}61 62const struct xattr_handler ext4_xattr_security_handler = {63 .prefix = XATTR_SECURITY_PREFIX,64 .get = ext4_xattr_security_get,65 .set = ext4_xattr_security_set,66};67